Journal of Food, Agriculture and Environment

Preliminary study on bacteria associated with invertebrates in granular active carbon filter

Author(s):

Tao Lin ^{1, 2}, Jian Zhang ^2*, Wei Chen ^{1, 2}, Wei Hua ³, Bin Shen ²

Recieved Date: 2011-07-16, Accepted Date: 2011-10-05

Abstract:

The implication of invertebrates found in granular active carbon filter in Taihu Lake Basin of China is a threat to public health of the concern water utilities. Previous studies have shown that the bacteria associated with the invertebrates could be potentially pathogenic to human being. Several sampling locations were selected and sampling was performed twice, at a two-week interval, from each location. The results indicated the level and identity of bacteria commonly associated with invertebrates collected from the granular active carbon filter. From all sampling occasions, bacteria were isolated from the collected invertebrate samples. During the investigation, the identified bacteria were pathogenic or opportunistic pathogens to human. Diarrhoea, meningitis, septicemias and skin infections are among the diseases associated with these organisms. The estimated number of bacteria that could be associated with a single invertebrate (as based on average invertebrate numbers) could range from 5 to100 bacteria per organism. It can, therefore, be concluded that bacteria associated with invertebrates under the worst case scenario might pose a potential health risk to water users. By using the QMRA approach and the Beta-Poisson model, a risk of infection of <0.21 was estimated for associated E. coli in drinking water. On the above situation, it is clear that invertebrates in granular active carbon filter should be controlled at a level as low as technically and economically feasible

Keywords:

Granular active carbon filter, invertebrates, bacteria, risk assessment

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Journal: Journal of Food, Agriculture and Environment
Year: 2011
Volume: 9
Issue: 3&4
Category: Environment
Pages: 682-687

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